/* ===== DESIGN TOKENS ===== */
:root {
  --ink: #1a1a1a;
  --ink-2: #4a4a4a;
  --ink-3: #888;
  --paper: #faf9f7;
  --paper-2: #f2f0ec;
  --paper-3: #e8e5df;
  --accent: #c9611a;
  --accent-light: #f5e9df;
  --accent-dark: #a34d14;
  --border: #dedad4;
  --white: #fff;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.07), 0 1px 3px rgba(0,0,0,0.05);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.11), 0 2px 8px rgba(0,0,0,0.07);
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --max-w: 1160px;
}

[data-theme="dark"] {
  --ink: #f0ede8;
  --ink-2: #b0a898;
  --ink-3: #6e6660;
  --paper: #161412;
  --paper-2: #1e1b18;
  --paper-3: #28231f;
  --accent: #e07535;
  --accent-light: #2a1a0e;
  --accent-dark: #f08040;
  --border: #312b26;
  --white: #1e1b18;
  --shadow: 0 2px 12px rgba(0,0,0,0.3), 0 1px 3px rgba(0,0,0,0.2);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.4), 0 2px 8px rgba(0,0,0,0.3);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
  font-weight: 300;
  transition: background 0.25s, color 0.25s;
}
a { color: inherit; text-decoration: none; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ===== HEADER / NAV ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,249,247,0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background 0.25s, border-color 0.25s;
}
[data-theme="dark"] .site-header { background: rgba(22,20,18,0.92); }
.nav {
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
  height: 60px; display: flex; align-items: center; justify-content: space-between;
}
.logo { font-family: var(--font-serif); font-size: 1.5rem; letter-spacing: -0.02em; color: var(--ink); }
.nav-right { display: flex; align-items: center; gap: 28px; }
.nav-links { display: flex; gap: 28px; font-size: 0.875rem; font-weight: 400; color: var(--ink-2); }
.nav-links a:hover { color: var(--accent); }

/* Dark mode toggle */
.theme-toggle {
  width: 38px; height: 22px; border-radius: 11px;
  background: var(--paper-3); border: 1px solid var(--border);
  position: relative; cursor: pointer; transition: background 0.25s;
  flex-shrink: 0;
}
.theme-toggle::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--ink-3); transition: transform 0.25s, background 0.25s;
}
[data-theme="dark"] .theme-toggle { background: var(--accent-light); border-color: var(--accent); }
[data-theme="dark"] .theme-toggle::after { transform: translateX(16px); background: var(--accent); }
.theme-icon { font-size: 0.8rem; position: absolute; top: 50%; transform: translateY(-50%); pointer-events: none; }
.theme-icon.sun { right: 4px; opacity: 0; }
.theme-icon.moon { left: 4px; }
[data-theme="dark"] .theme-icon.sun { opacity: 1; }
[data-theme="dark"] .theme-icon.moon { opacity: 0; }

/* ===== HERO ===== */
.hero {
  min-height: 80vh; display: flex; align-items: center; justify-content: space-between;
  gap: 48px; max-width: var(--max-w); margin: 0 auto; padding: 80px 24px;
}
.hero-inner { max-width: 520px; }
.hero-eyebrow {
  font-size: 0.78rem; font-weight: 500; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 20px;
}
.hero h1 {
  font-family: var(--font-serif); font-size: clamp(3rem, 5vw, 4.5rem);
  line-height: 1.1; letter-spacing: -0.03em; color: var(--ink); margin-bottom: 24px;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.hero-sub { font-size: 1.1rem; color: var(--ink-2); line-height: 1.7; margin-bottom: 36px; }
.cta-btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--ink); color: var(--paper); padding: 14px 28px;
  border-radius: 100px; font-size: 0.9rem; font-weight: 500;
  transition: background 0.2s, transform 0.2s;
}
.cta-btn:hover { background: var(--accent); transform: translateY(-1px); }
.hero-grid-deco { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; flex-shrink: 0; }
.deco-card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 24px; font-family: var(--font-serif); font-size: 1.1rem; color: var(--ink-2);
  box-shadow: var(--shadow); animation: floatIn 0.6s ease both;
  transition: transform 0.3s, box-shadow 0.3s;
}
.deco-card:nth-child(1){animation-delay:0.1s}.deco-card:nth-child(2){animation-delay:0.2s}
.deco-card:nth-child(3){animation-delay:0.3s}.deco-card:nth-child(4){animation-delay:0.4s}
.deco-card:nth-child(5){animation-delay:0.5s}.deco-card:nth-child(6){animation-delay:0.6s}
.deco-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
@keyframes floatIn { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:translateY(0)} }

/* ===== TOOLS SECTION ===== */
.tools-section { padding: 80px 0 100px; background: var(--paper-2); border-top: 1px solid var(--border); }
.section-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 40px; flex-wrap: wrap; }
.section-header h2 { font-family: var(--font-serif); font-size: 2rem; letter-spacing: -0.02em; }
.filter-tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-btn {
  padding: 7px 16px; border-radius: 100px; border: 1px solid var(--border);
  background: transparent; color: var(--ink-2); font-family: var(--font-sans);
  font-size: 0.8rem; cursor: pointer; transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--ink-2); color: var(--ink); }
.filter-btn.active { background: var(--ink); border-color: var(--ink); color: var(--paper); }

.tools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.tool-card {
  display: flex; align-items: center; gap: 16px;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.tool-icon {
  font-size: 1.3rem; width: 44px; height: 44px; background: var(--accent-light);
  border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-family: var(--font-serif); color: var(--accent-dark);
}
.tool-card h3 { font-size: 0.9rem; font-weight: 500; margin-bottom: 3px; }
.tool-card p { font-size: 0.78rem; color: var(--ink-3); line-height: 1.4; }

/* ===== ABOUT ===== */
.about-section { padding: 100px 0; border-top: 1px solid var(--border); }
.about-inner { display: grid; grid-template-columns: 1fr auto; gap: 80px; align-items: center; }
.about-text h2 { font-family: var(--font-serif); font-size: 2.2rem; letter-spacing: -0.02em; margin-bottom: 20px; }
.about-text p { color: var(--ink-2); line-height: 1.8; margin-bottom: 12px; max-width: 480px; }
.about-stats { display: flex; gap: 40px; }
.stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.stat-num { font-family: var(--font-serif); font-size: 2.5rem; color: var(--accent); line-height: 1; }
.stat-label { font-size: 0.75rem; color: var(--ink-3); text-align: center; }

/* ===== FOOTER ===== */
.site-footer { background: var(--ink); color: rgba(255,255,255,0.4); padding: 28px 0; }
[data-theme="dark"] .site-footer { background: var(--paper-3); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; }
.site-footer .logo { color: rgba(255,255,255,0.85); font-size: 1.2rem; }
.footer-tagline { font-size: 0.82rem; }

/* ===== TOOL PAGE — BIGGER LAYOUT ===== */
.tool-page { min-height: 100vh; display: flex; flex-direction: column; }
.tool-main { flex: 1; max-width: var(--max-w); margin: 0 auto; padding: 40px 24px 80px; width: 100%; }
.tool-hero { margin-bottom: 28px; }
.breadcrumb { font-size: 0.78rem; color: var(--ink-3); margin-bottom: 12px; }
.breadcrumb a { color: var(--accent); }
.tool-hero h1 { font-family: var(--font-serif); font-size: clamp(2rem, 3.5vw, 3rem); letter-spacing: -0.02em; margin-bottom: 8px; }
.tool-hero p { color: var(--ink-2); font-size: 1rem; max-width: 640px; }

/* ===== PANELS ===== */
.panel {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow);
}
.panel + .panel { margin-top: 16px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.two-col-narrow { display: grid; grid-template-columns: 1fr 320px; gap: 16px; }
.three-col { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }

/* ===== FORM ELEMENTS ===== */
label {
  display: block; font-size: 0.78rem; font-weight: 500; color: var(--ink-2);
  margin-bottom: 7px; text-transform: uppercase; letter-spacing: 0.05em;
}
textarea, input[type="text"], input[type="number"], input[type="email"], select {
  width: 100%; background: var(--paper); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px;
  font-family: var(--font-sans); font-size: 0.9rem; color: var(--ink);
  outline: none; transition: border-color 0.2s; font-weight: 300;
}
textarea:focus, input:focus, select:focus { border-color: var(--accent); }
textarea { resize: vertical; min-height: 200px; }
select { cursor: pointer; }

/* ===== BUTTONS ===== */
button, .btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 18px; border-radius: 100px; border: 1px solid var(--border);
  background: var(--white); color: var(--ink);
  font-family: var(--font-sans); font-size: 0.85rem; cursor: pointer;
  transition: all 0.18s; white-space: nowrap;
}
button:hover { border-color: var(--ink-2); background: var(--paper-2); }
button.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
button.accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
button.primary { background: var(--ink); border-color: var(--ink); color: var(--paper); }
button.primary:hover { opacity: 0.85; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; align-items: center; }

/* ===== CHECKBOXES ===== */
.checkbox-group { display: flex; flex-direction: column; gap: 10px; }
.checkbox-row { display: flex; align-items: center; gap: 10px; font-size: 0.88rem; cursor: pointer; }
.checkbox-row input { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; flex-shrink:0; }

/* ===== RANGE ===== */
input[type="range"] {
  -webkit-appearance: none; width: 100%; height: 4px;
  border-radius: 2px; background: var(--border); outline: none; padding: 0; margin: 4px 0;
}
input[type="range"]::-webkit-slider-thumb { -webkit-appearance:none; width:18px; height:18px; border-radius:50%; background:var(--accent); cursor:pointer; }

/* ===== RESULT BOX ===== */
.result-box {
  background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 14px; font-family: 'Courier New', monospace; font-size: 0.88rem;
  min-height: 140px; white-space: pre-wrap; word-break: break-word; color: var(--ink);
}

/* ===== TABS ===== */
.tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab-btn {
  padding: 10px 20px; border: none; background: transparent; border-radius: 0;
  font-size: 0.85rem; color: var(--ink-3); border-bottom: 2px solid transparent; margin-bottom: -1px;
  cursor: pointer; font-family: var(--font-sans);
}
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-btn:hover { background: transparent; color: var(--ink); border-color: transparent; border-bottom-color: var(--border); }

/* ===== STRENGTH METER ===== */
.strength-meter { display: flex; gap: 4px; margin-top: 10px; }
.strength-meter span { flex: 1; height: 3px; border-radius: 2px; background: var(--border); transition: background 0.3s; }
.strength-meter span.w1 { background: #e53935; }
.strength-meter span.w2 { background: #ff9800; }
.strength-meter span.w3 { background: #fdd835; }
.strength-meter span.w4 { background: #43a047; }
.strength-text { font-size: 0.78rem; color: var(--ink-3); margin-top: 6px; }

/* ===== CALCULATOR ===== */
.calc-wrap { display: grid; grid-template-columns: 340px 1fr; gap: 16px; }
.calc-screen {
  background: var(--ink); color: var(--paper);
  padding: 18px 20px; border-radius: var(--radius-sm); margin-bottom: 12px;
  text-align: right; min-height: 90px; display: flex; flex-direction: column; justify-content: flex-end;
}
.calc-expression { font-size: 0.82rem; color: rgba(255,255,255,0.4); min-height: 20px; word-break: break-all; }
.calc-result { font-family: var(--font-serif); font-size: 2.2rem; word-break: break-all; }
.calc-keypad { display: grid; grid-template-columns: repeat(5,1fr); gap: 6px; }
.calc-keypad button { border-radius: var(--radius-sm); padding: 13px 4px; font-size: 0.88rem; justify-content: center; border-radius: var(--radius-sm); }
.calc-keypad button.op { background: var(--accent-light); border-color: transparent; color: var(--accent-dark); font-weight: 500; }
.calc-keypad button.eq { background: var(--accent); border-color: transparent; color: #fff; }
.calc-keypad button.eq:hover { background: var(--accent-dark); }

/* ===== DROP ZONE ===== */
.drop-zone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 52px 24px; text-align: center; cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}
.drop-zone:hover, .drop-zone.over { border-color: var(--accent); background: var(--accent-light); }
.drop-icon { font-size: 2.8rem; margin-bottom: 14px; }
.drop-label { font-weight: 400; margin-bottom: 4px; font-size: 1rem; }
.drop-hint { font-size: 0.8rem; color: var(--ink-3); }

/* ===== SCORE / TODO ===== */
.score-row { display: flex; align-items: center; gap: 12px; padding: 14px 16px; background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 8px; }
.todo-item { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 6px; }
.todo-item.done .todo-text { text-decoration: line-through; color: var(--ink-3); }

/* ===== TAG / BADGE ===== */
.tag { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; background: var(--paper-2); border: 1px solid var(--border); color: var(--ink-2); }

/* ===== INFO BOX ===== */
.info-box { background: var(--accent-light); border: 1px solid var(--accent); border-radius: var(--radius-sm); padding: 12px 16px; font-size: 0.85rem; color: var(--ink-2); margin-bottom: 14px; }

/* ===== LOCATION ===== */
.loc-row { display: flex; justify-content: space-between; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.88rem; }
.loc-row:last-child { border-bottom: none; }
.loc-key { color: var(--ink-3); }
.loc-val { font-weight: 500; font-family: 'Courier New', monospace; font-size: 0.85rem; }

/* ===== MORSE ===== */
.morse-output {
  font-family: 'Courier New', monospace; font-size: 1rem; letter-spacing: 0.08em;
  background: var(--paper); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 16px; min-height: 100px; word-break: break-all; color: var(--ink);
}

/* ===== EMOJI ===== */
.emoji-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(40px,1fr)); gap: 3px; max-height: 340px; overflow-y: auto; }
.emoji-btn { padding: 7px; font-size: 1.4rem; border: 1px solid transparent; border-radius: 8px; background: transparent; cursor: pointer; text-align: center; transition: background 0.1s; }
.emoji-btn:hover { background: var(--accent-light); border-color: var(--border); }

/* ===== PROGRESS / STAT CARD ===== */
.stat-card { background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 18px; text-align: center; }
.stat-card .n { font-family: var(--font-serif); font-size: 2.2rem; color: var(--accent); }
.stat-card .l { font-size: 0.74rem; color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 2px; }

/* ===== DIFF ===== */
.diff-item { padding: 5px 10px; border-radius: 5px; margin-bottom: 3px; font-size: 0.85rem; }
.common { background: #e8f5e9; color: #1b5e20; }
.only-a { background: #fff8e1; color: #e65100; }
.only-b { background: #e3f2fd; color: #0d47a1; }
[data-theme="dark"] .common { background: #1b3a1f; color: #81c784; }
[data-theme="dark"] .only-a { background: #3a2200; color: #ffb74d; }
[data-theme="dark"] .only-b { background: #0d1f3a; color: #64b5f6; }

/* ===== HISTORY ===== */
.history-item { padding: 6px 10px; border-bottom: 1px solid var(--border); font-size: 0.82rem; display: flex; justify-content: space-between; gap: 8px; }
.history-item:last-child { border-bottom: none; }

/* ===== MAGIC BALL ===== */
.ball { width: 210px; height: 210px; background: radial-gradient(circle at 35% 35%, #444 0%, #111 50%, #000 100%); border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: 0 12px 48px rgba(0,0,0,0.4), inset 0 2px 4px rgba(255,255,255,0.06); transition: transform 0.15s; }
.ball:hover { transform: scale(1.04); }
.ball:active { transform: scale(0.96); }
.ball-inner { width: 95px; height: 95px; background: radial-gradient(circle at 40% 40%, #1e4db7, #0a1a6e); border-radius: 50%; display: flex; align-items: center; justify-content: center; transition: opacity 0.3s; }
.ball-inner span { font-family: var(--font-serif); color: rgba(190,210,255,0.9); font-size: 0.72rem; text-align: center; padding: 10px; line-height: 1.4; }
@keyframes shake { 0%,100%{transform:translateX(0)} 20%{transform:translateX(-9px)} 40%{transform:translateX(9px)} 60%{transform:translateX(-6px)} 80%{transform:translateX(6px)} }
.shaking { animation: shake 0.5s ease; }

/* ===== COUNTER ===== */
.big-btn { width: 160px; height: 160px; border-radius: 50%; background: var(--ink); color: var(--paper); border: none; font-size: 2rem; cursor: pointer; transition: transform 0.08s, background 0.2s; box-shadow: 0 6px 24px rgba(0,0,0,0.15); }
.big-btn:hover { background: var(--accent); }
.big-btn:active { transform: scale(0.93); }

/* ===== COPY FLASH ===== */
.copied-flash { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--ink); color: var(--paper); padding: 9px 22px; border-radius: 100px; font-size: 0.85rem; pointer-events: none; opacity: 0; transition: opacity 0.25s; z-index: 9999; }
.copied-flash.show { opacity: 1; }

/* ===== WORD HIGHLIGHT ===== */
mark { background: #fff176; color: var(--ink); border-radius: 2px; padding: 0 2px; }
[data-theme="dark"] mark { background: #6d5a00; color: #ffe082; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-3); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero { flex-direction: column; min-height: auto; padding: 60px 24px; }
  .hero-grid-deco { width: 100%; }
  .about-inner { grid-template-columns: 1fr; gap: 40px; }
  .about-stats { justify-content: flex-start; }
  .two-col, .two-col-narrow, .calc-wrap, .three-col { grid-template-columns: 1fr; }
  .section-header { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 540px) {
  .hero h1 { font-size: 2.4rem; }
  .tools-grid { grid-template-columns: 1fr; }
  .deco-card { padding: 14px 18px; font-size: 0.95rem; }
}

/* ===== ALIGNMENT FIXES ===== */
/* Equal height panels in two-col layouts */
.two-col, .two-col-narrow {
  align-items: stretch;
}
.two-col > .panel,
.two-col-narrow > .panel,
.two-col > div > .panel {
  height: 100%;
  display: flex;
  flex-direction: column;
}
/* Textareas in equal-height panels stretch to fill */
.two-col .panel textarea,
.two-col-narrow .panel textarea {
  flex: 1;
  min-height: 200px;
}